I never seem to have any luck using vise grip pliers. Not sure exactly why, but the pliers seem to pop out of vise or slide and move.

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I tried regular and did not like for the same reason. The claw sides are small and rounded. For me there was too small of an area to grip in a vise. The blue points have a larger all flat area to grip with the vise and butt right up to the vice jaws helping preventing any lateral movement.